Molding-machine.



J. A. GUY.

HOLDING MACHINE.

APPLIGATION FILED JUNE 10, 1914.

1 1 22, 1 O5. 4 Patented Dec. 22, 1914.

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Ja/mAfiay,

"HE NDRRIS PETERS (20., F'HOTDJJTH" WASHINGTON n r J. A. GUY.

MOLDING MACHINE.

APYLIOATIOH FILED JUNE 10, 1914.

1 1 22, 1 O5. Patented Dec. 22, 1914.

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J.A.GUY

MOLDING MACHINE.

APPLICATION FILED JUNE 10, 1914.

Patented Dec. 22, 19%

4 SHEETS-SHEET 3.

a s L mm Elbtoimc 1 .I llllllwlil 3 5 PETER: c0 PHom-Lnrlo J. A. GUY.

MOLDING MACHINE.

APPLICATION FILED JUNE 10,1914.

1 1 22, 1 O5, Patented Dec. 22, 1914.

4 SHEETSSHEET 4.

5 Swuamtm UNITED STATES PATENT OFFICE.

JOHN A. GUY, 0F WATERVLIET, NEW YORK.

MOLDING-MACHINE.

Application filed June 10, 1914.

To all whom it may concern Be it known that I, JOHN A. GUY, a citizen of the United States, residing at Watervliet, in the county of Albany and State of New York, have invented new and useful Improvements in Molding-lvlachines, of which the following is a specification.

This invention relates to sand molding machines, the object of the invention being to provide a simple molding machine capable of quick and certain operation by means of which a plurality of flasks may be handled simultaneously thus materially in creasing the output of the machine while insuring superior work.

A further object of the invention is to provide means operable by motive power for compressing the sand in the flasks and shiftin g the flask sections laterally after the compressing operation is completed thus doing away to a large extent with the manual operations now in common use in foundries.

lVith the above and other objects in view,

the invention consists in the novel construction, combination and arrangement of parts, as will be hereinafter more fully described, illustrated and claimed.

In the accompanying drawings :F igure 1 is a front elevation of a molding machine embodying the present invention. Fig. 2 is a side elevation of the same. Fig. 3 is a vertical longitudinal section taken centrally of the main compressing cylinder and the main controlling valve therefor. Fig. 4 is a detail cross section through the main valve. Fig. 5 is a central vertical cross section on the line 55 of Fig. 1. Fig. 6 is a vertical cross section on the line 66 of Fig. 1 taken in line with one of the carriage side bars and its rollers and also indicating the two extreme positions of the carriage. Fig. 7 is a perspective view of the reversible flask holding frame. Fig. 8 is a detail longitudinal section through a part of said frame show ing the flask grippers and gripper actuating means. Fig. 9 is a reverse plan view of the flask holding frame. Fig. 10 is a plan view of the machine. Fig. 11 is a horizontal section through the machine taken above the carriage and showing the carriage actuating cylinder, piston and connections. Fig. 12 is a detail section through the carriage controlling valve.

The sand molding machine contemplated in this invention comprises essentially a supporting base 1 centrally of which is lo- Spccification of Letters Patent.

Patented Dec. 22, 1914. Serial No. 844,290.

cated a compressing cylinder 2 in which is a reciprocatory piston 3 adapted to be actuated by steam, air or any other fluid which is admitted to a passage 4 in the base through a pipe 5 controlled by a valve to be hereinafter more particularly described. The piston 3 carries at its upper end a plunger 6 in the form of a plate of any desired size in accordance with the size of the flask or flasks to be used in the machine, the said plate being shown as substantially rectangular in plan view and being formed with a central transverse depression or groove 7 for the rod of the carriage actuating piston hereinafter referred to.

Extending upwardly from the base 1 and secured rigidly thereto are uprights 8 which preferably consist of vertical rods four in number, each of said rods being provided at a suitable elevation with an annular shoulder 9 for limiting the downward move ment of the bearings which support the reversible flask holding frame hereinafter described. Two of such upright guide rods are arranged at each end of the machine frame and each pair of said rods is embraced by the sleeve-like end portions or runners 10 of a vertically slidable bearing 11 formed with a bearing opening 12 to receive one of the end trunnions 13 of the reversible flask holder so as to enable said flask holder to be inverted or turned entirely over for a purpose to appear.

The flask holding frame is substantially in the form of an open skeleton rectangle and is indicated at 1 1, the end bars of said frame being provided with the outwardly projecting trunnions 13 above referred to. The side bars 14: are internally rabbeted at 15 to adapt the pattern holding plates 16 to be secured therein thus enabling plates of different sizes to be used in accordance with the sizes of the flasks, A designating generally one of the flasks composed of the two section aand a. The plates 16 are provided adjacent to their opposite marginal edges with dowel pin holes 17 and also with dowel pins 18 to fit corresponding pins and holes with which the flask sections are provided so as to prevent any shlftmg of the flask sections upon or relatively to the flask holding frame.

19 designates flask grippers 0r flask holding fingers which are pivotally mounted at 21 on extensions 22 of the frame 14, the pivots of said grippers occurring at points intermediate the ends thereof. In connection with the set of grippers at each side of the flask holding frame, I employ a longitudinally slidable bar or rod 23 having camlike projections 24 thereon which are adapted to cooperate with the inner ends of the grippers to force the outer working extremities of said grippers over the edge of the adjacent flask section to prevent such flask section from falling off the flask holding frame when the latter is turned entirely over or inverted for a purpose which will hereinafter appear. The gripper actuating bars or rods at opposite sides of the frame 14. are both connected pivotallv at their corresponding ends as shown to a two-armed lever 25 which is pivotally connected about midway of its length to a lug 26 on one of the end bars of the frame 14, the opposite extremities of the lever arms 25 being extended to formhandles 27 which may be conveniently grasped by the operator for the purpose of simultaneously operating all of the grippers.

The plunger 6 constitutes the reciprocatory sand compressing element of the machine and in opposition thereto I employ a normally stationary sand compressing element embodying an overhead cross beam 28 to which is secured a platen 29, two of such platens being illustrated in the drawings for use in connection with two molding flasks both of which are operated upon at the same time. The beam 28 is secured in fixed relation to the upper extremities of a pair of oppositely arranged arms 30 which are connected by pivot bolts 31 or their equivalent to the supporting base 1. By the construction just referred to, the overhead beam 28 and the platen 29 may be moved laterally of the machine to carry said platen out of the path of the plunger for the pur pose of manipulating the flasks as will hereinafter appear and to enable the reversible flask holding frame to be inverted or turned over. The movement of the arms 30 is limited in both directions by means of stops 32 and 33 shown for convenience as formed on horizontal end bars 34 connecting the uprights 8 as shown in the end elevation, the stops 32 serving to hold the platens directly over the plunger 6 and above the reversible flask holder.

To facilitate the handling of the flasks ing the cylinder 3 and uprights 8 and the said side bars 34 also pass under other antifriction rollers ournaled on short posts rising from bars 40 bearing the same relation to the machine as the bars 38. The two sets of rollers referred to prevent the sagging or tipping over of the carriage when projected laterally to one side of the machine to deliver the lower sections of the flasks in convenient position to receive the upper or complemental flask sections.

To the connecting cross bar 36 is attached the extremity of a piston rod 41 the piston 42 of which works back and forth in a cylinder 43. Any suitable motive fluid is carried to the opposite ends of said cylinder I through a pipe 44 extending lengthwise of the cylinder and communicating with a branch pipe 45 which leads into a valve casing 46. Another pipe 47 leads from said valve casing to the opposite end of the cylinder 43. By admitting air or other fluid alternately to opposite ends of said cylinder, a back and forth movement is imparted to the flask carriage and when said carriage is in its innermost position, the plunger 6 is adapted to move freely up and down between the side bars 34 and the cross bars 35 and 36 of said carriage. The carriage thus does not interfere with the movement of the plunger.

48 designates the carriage controlling valve mounted in the casing 36 and adapted when turned in one direction to admit air to one end of the cylinder 43 and when turned in the opposite direction to exhaust such air or other fluid and admit it to the opposite end of the cylinder.

The pipe which leads to the cylinder 2 is provided with a main valve case 49 containing the main valve 50 which is provided with a small opening to allow air to pass slowly into the cylinder 2 to effect a correspondingly slow upward movement to the plunger 6 and also provided with a large opening or slot to allow the air or other fluid to act with'full force on the piston 3 to carry the plunger 6 upwardly and thoroughly pack the sand in the flasks. The valve casing 49 is also provided with a plurality of exhaust holes 51 of different sizes adapted to receive plugs so that a hole of any size or more than one hole at a time may be left open for the purpose of regulating the rapidity of descent of the piston 3 and the plunger 6 to obtain he best results.

The operation of the machine hereinabove described and illustrated in the accompanying drawings may be described as follows: The arms 30 are swung laterally so as to carry the platens 29 to one side of the machine so as to leave the flask holding frame 14 free to be reversed or turned entirely over. The side of the flask holder containing the grippers is placed upwardly and two flask sections are placed thereon, the positions of said flasks being determined by the holes and pins 17 and 18 referred to. Then by operating the lever 25, the said flask sections are engaged by the grippers so that when the frame 14 is inverted, said flask sections will be held securely to the frame 14. The sand is pressed into the flask sections with sufficient tightness to be retained therein when the frame 11- is inverted. or turned over. This is now done and the other complemental flask sections are placed upon the reverse side of the frame 11 which is now uppermost. The arms 30 are then rocked inward so as to restore the platens 29 to their normal compressing position. The piston 3 is then operated to elevate the plunger 6 and as said plunger moves upwardly it first engages the flask sections on the bottom of the frame 14: and moves said sections together with said frame upwardly toward the stationary platens 29. The sand is thus simultaneously compressed in both the upper and lower flask sections, this be" ing rendered possible by the upward sliding movement of the flask holding frame, it being noted that said flask holding frame has a pivotal mounting and also a sliding mounting in the machine frame. The manually operated lever 52 of the main valve 50 is then moved to a position to exhaust the motive fluid to permit the plunger 6 to descend and simultaneously therewith the grippers are operated to release the lowermost flask sections which thereby move downwardly with the plunger until they rest upon the carriage. The carriage is then actuated by the means described so as to cause the flask sections resting thereon to be presented at the front of the machine. The platens 29 then being swung in the opposite direction out of the way, the flask sections remaining on the flask holding frame 14 are then taken therefrom by the operator and placed upon the lower flask sections resting on the carriage. This completes the molding operation, the flasks being then removed from the machine. The carriage is then restored to its initial position and the operation hereinabove outlined is for each pair of flasks.

While I have herein described the machine as adapted for operation simultaneously on a pair of complete molds or flasks, it will of course be understood that the operation may be effected on a single flask at a time or a larger number of smaller flasks and furthermore, the size of the machine may be increased or diminished to suit requirements. It will also be understood that the drawing of the pattern is effected when the flask sections on the bottom of the reversible flask holding frame move downwardly with the plunger on which they rest thus automatically performing another step in the molding operation.

What I claim is 1. In a molding machine, a supporting base, uprights extending upwardly thererepeated from, a flask holding frame movable up and down and guided by said uprights, a platen above said flask holding frame, and a sandoompressing plunger under said flask holding frame.

2. In a molding machine, a supporting base, uprights extending upwardly therefrom, a flask holding frame movable up and down and guided by said uprights, a platen above said flask holding frame, and a sandcompressing plunger under said flask holding frame, said platen being shiftable out of the plane of movement of said plunger.

3. In a molding machine, a supporting base, uprights extending upwardly therefrom, a flask holding frame movable up and down and guided by said uprights, a platen above said flask holding frame, and a sandcompressing plunger under said flask holding frame, said platen being shiftable out of the plane of movement of said plunger, said flask holding frame being invertible.

4:. In a molding machine, a supporting base, uprights extending upwardly therefrom, a flask holding frame movable up and down and guided by said uprights, a platen above said flask holding frame, a sandcompressing plunger under said flask holding frame, said platen being shiftable out of the plane of movement of said plunger, said flask holding frame being invertible, and flask gripping means on said flask holding frame.

5. In a molding machine, a supporting base, uprights extending upwardly therefrom, a flask holding frame movable up and down and guided by said uprights, a platen above said flask holding frame, a sand-compressing plunger under said flask holding frame, said platen being shiftable out of the plane of movement of said plunger, said flask holding frame being invertible, a plurality of flask gripping fingers on said flask holding frame, and means for simultaneously operating said fingers.

6. In a molding machine, oppositely arranged sand-compressing elements one of which is movable toward and away from the other, in combination with a flask holding member adapted to be actuated by the reciprocatory sand-compressing element toward the other sand-compressing element, and a flask carriage having an opening through which the reciprocatory sand-compressing element is movable.

In a molding machine, oppositely arranged sand-compressing elements one of which is movable toward and away from the other, in combination with a flask holding member adapted to be actuatel by the reciprocatory sand-compressing element to ward the other sand-compressing element, a flask carriage having an opening through which the reciprocatory sand-compressing element is movable, means for operating said reciprocatorycompressing element, and means for independently operating said carriage.

8. In a molding machine, oppositely arranged sand-compressing elements one of which is movable toward and away from the other, in combination with a flask holding member adapted to be actuated by the reciprocatory sand-compressing element toward the other sand-compressing element, and a flask carriage slidable in a plane between said compressing elements and perpendicular to the line'of compressing movement of one of said elements.

9. In a molding machine, oppositely arranged sand-compressing elements one of which is movable toward and away from the other, in combination with a flask holding member adapted to be actuated by the reciprocatory sand-compressing element toward the other sand-compressing element, and arms permitting one of said compressing elements to be shifted laterally with respect to the line of compressing movement of the other of said elements.

In testimony whereof I affix my signature in presence of two witnesses.

JOHN A. GUY.

Vitnesses:

FRED W. GRIEs, GEORGE WV. WVHITE.

Copies 01 this patent may be obtained for five cents each, by addressing the Commissioner of Batents,

' Washington, D. 0. 

